Seizure symptoms or not. Being repeated?

At IRREGULAR , my father observed that right side in his brain some blood circulation being taking place during sleeping time, while at work, during middle of conversation etc, During this time, right hand will get goose bumps till the end of fingers. The duration of this type of symptom is for few seconds, maxi 40 sec., No headache or any type of inconvenience., As no negative reports in EEG, MRI SCAN, CT SCAN,etc., doctors telling "nothing to worry". But, he is worring more. To stop this what to do ? Under what circumstances, it is being repeated ? After 30 sec, he will be normal.SOME BODY TELLS IT IS DUE T O SEIZURES; and he is using EPSOLIN TABLETS AND VALPARIN200 DAILY TWICE FOR THE LAST SIX YEARS BUT, NO DECREASE OF NUMBER OF SYMPTOMS. BUT, DUE TO THIS HE IS BECOMING DULL.